```html
<!-- 使用AntD布局容器 -->
<div style="display: flex; gap: 16px; padding: 24px" 
     data-antd-component="Row(gutter=16, justify=space-between)"
     class="ant-row ant-row-space-between">
  
  <!-- 侧边导航 -->
  <aside style="width: 200px; background: #f0f2f5" 
         data-antd-component="Menu Pro(Sider)"
         class="ant-menu ant-menu-inline">
    <nav style="font-size: 14px; color: #1890ff">
      <div style="margin-bottom: 16px">审批进程</div>
      <div style="display: flex; align-items: center">
        <img src="user-icon.png" alt="用户头像" style="width: 32px; height: 32px; margin-right: 8px">
        <span>发起审批</span>
      </div>
      <div style="display: flex; align-items: center">
        <img src="user-icon.png" alt="用户头像" style="width: 32px; height: 32px; margin-right: 8px">
        <span>项目负责人审批</span>
      </div>
    </nav>
  </aside>

  <!-- 主内容区 -->
  <main style="flex: 1; min-width: 0" 
        data-antd-component="Col(span=18)"
        class="ant-col ant-col-18">
        
    <!-- 页面标题 -->
    <h1 style="margin-bottom: 16px; font-size: 18px; color: #333">项目需求内容变更</h1>

    <!-- 选项卡 -->
    <ul style="list-style: none; display: flex; border-bottom: 1px solid #e8e8e8; margin-bottom: 16px">
      <li style="padding: 8px 16px; cursor: pointer; background: #fff; border-top-left-radius: 4px; border-top-right-radius: 4px">变更信息</li>
      <li style="padding: 8px 16px; cursor: pointer">信息通知</li>
    </ul>

    <!-- 特性信息 -->
    <div style="background: #fff; padding: 16px; border-radius: 8px; margin-bottom: 16px">
      <h2 style="font-size: 14px; color: #666; margin-bottom: 8px">特性信息</h2>
      <div style="display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px">
        <div>
          <label style="display: block; margin-bottom: 4px">特性名称</label>
          <input type="text" value="东方国际" style="width: 100%; border: 1px solid #d9d9d9; padding: 8px; border-radius: 4px">
        </div>
        <div>
          <label style="display: block; margin-bottom: 4px">特性编号</label>
          <input type="text" value="IT990946-F8268695589" style="width: 100%; border: 1px solid #d9d9d9; padding: 8px; border-radius: 4px">
        </div>
        <div>
          <label style="display: block; margin-bottom: 4px">所属专题</label>
          <input type="text" value="专题特性送审测试" style="width: 100%; border: 1px solid #d9d9d9; padding: 8px; border-radius: 4px">
        </div>
        <div>
          <label style="display: block; margin-bottom: 4px">所属专题编号</label>
          <input type="text" value="IT990946-E153" style="width: 100%; border: 1px solid #d9d9d9; padding: 8px; border-radius: 4px">
        </div>
        <div>
          <label style="display: block; margin-bottom: 4px">特性负责人</label>
          <input type="text" value="伍留/80293464" style="width: 100%; border: 1px solid #d9d9d9; padding: 8px; border-radius: 4px">
        </div>
      </div>
    </div>

    <!-- 变更说明 -->
    <div style="background: #fff; padding: 16px; border-radius: 8px">
      <h2 style="font-size: 14px; color: #666; margin-bottom: 8px">变更说明</h2>
      <div style="display: grid; grid-template-columns: 1fr; gap: 16px">
        <div>
          <label style="display: block; margin-bottom: 4px">变更原因</label>
          <input type="text" value="其他" style="width: 100%; border: 1px solid #d9d9d9; padding: 8px; border-radius: 4px">
        </div>
        <div>
          <label style="display: block; margin-bottom: 4px">变更说明</label>
          <textarea style="width: 100%; height: 100px; border: 1px solid #d9d9d9; padding: 8px; border-radius: 4px">1212</textarea>
        </div>
        <div>
          <label style="display: block; margin-bottom: 4px">变更文档</label>
          <div style="border: 1px dashed #d9d9d9; padding: 8px; border-radius: 4px">无</div>
        </div>
      </div>
    </div>

    <!-- 操作按钮 -->
    <div style="text-align: right; margin-top: 16px">
      <button style="margin-right: 8px; padding: 8px 16px; border: 1px solid #d9d9d9; border-radius: 4px; background: #fff">关闭</button>
      <button style="margin-right: 8px; padding: 8px 16px; border: 1px solid #d9d9d9; border-radius: 4px; background: #fff">保存</button>
      <button style="margin-right: 8px; padding: 8px 16px; border: 1px solid #ff4d4f; border-radius: 4px; background: #ff4d4f; color: #fff">拒绝</button>
      <button style="padding: 8px 16px; border: 1px solid #1890ff; border-radius: 4px; background: #1890ff; color: #fff">同意</button>
    </div>
  </main>
</div>
```